Valye-geab



s. -RosENzwuGl VALVE GEAR. v APPLICATION FILED DEC.20. |918. 1,323,788.

. ROSENZWEIG..

VALVE GEAR, APPucATloN mso DEC. 2o. 1918.

Patented Deo. 2, 1919.

2 SHEETS-SHEET 2.

narran srarns Parana onirica. f

SIZES-FRIED ROSENZ'WEIG, OF NEW YORK, N. Y. l

VALVE-GEAR.

Specification of Letters latent.y Patented Dec. 2, 1919.

Application filed December 20, 1918. Serialr No. "267,620. I f

To all whom it may concern: i

Be it known that I, Slnermnn ROSEN- awnic, a citizen of the United States, and a resident of they city of New Yorlnin the countyand State of N ew York, have invented certain new and' useful Improvements in TValve-Gears, of which the following is a specification. Y y

My inventionrelates to the valve gear of a reciprocating engine in which puppet valves are employed, and it consists incertain improvements which will first be described in connection with the accompanying drawings and will then bemore specilically pointed out in the claims.

ln the drawings- V i Figure 1 is a transverse section of a steam engine cylinder with my improvement applied thereto, on line 1 1 F ig. B--the line of section of the steam valve appliances being in the vertical plane of the axis of the valve vchamber or chest Fig. 3 is an end elevation partly in sec-.

tion of the valve chambers or chests, one at each end ofthe steam cylinder, the latter being in side elevation partly in longitudinal vertical axial section.

A is the steam cylinder. B are the cylindrical valve chests or chambers, one at each end of the 'steam cylinder and extending crosswise of, and substantially tangential to, the same. These chambers, together with the valves and valve gearappliances contained in or connected with them, are the same at each end of the steam cylinder, so that a description of oneJ will answer for both. C is a cage of cylindrical exterior removable from but closely fitted and held in the valve chest B, which is machined out to receive it and is formed `with an internal shoulder b against which ,the cage brings up. Vithin the cage is contained a double seated puppet valve V. The cage is provided with seats to engage the seats on the valve V and with an axial tubular bearing or guide for the valve spindle w, cast in one with the rear wall of the clearance chamber D. These parts may be of any usual or suitable construction, preferably such as shown.`

in my Patent No. 1,125,724 of January 19, 1915, in which form they here are represented. The inlet through which the steam enters the steam cylinder is indicated at. c.

lVhen the valve is open (in which posisition it is shown in the drawings) steam passes from the inlet end'cof the. valve chamber through the valve V and clearance chamber D in the cage, and thence .throughthe inlet port c into the steam cylinder.

The cage C at its end opposite thatwhich contains the valve extends beyond the-spindle guide x out through 'the open end Vof the valve chest B and isprovided with an annular laterally Vprojecting ange c, which overlaps and lits snugly against the face of a corresponding liange d' on the end of the latter,'thus providing in a convenient manner for removablysecuring the cage in l'place in the valve chest by means of bolts -and nuts 7" as indicated in Fig. `3.

Diainetrically crosswise of the cage, near its open end and cast inone therewith, is a tubular bearing g forthe valve operating cam or tappet shaft S. This bearing is not continuous, but is composedof two portions which'extend in an axial alinement with one another, from opposite sides of the cage toward the center, but do not meet, there being a lspace `between their inner opposite ends as shown more particularlyy iny Figs. 2 and 3. This central space between the twofis spanned by another tubular bearing /L cast in one with the divided bearing g and cage C, the bore of which is in axial alinement with thevalve spindle to, and is intended to receive the roller-carrierwhich is secured to the end ofthe valve spindle as shown, and .has mounted on it the pivoted anti-friction roller 7c which protrudes into the open space between two 'I opposed endsy ofthe divided bearing g in position to be acted on by the cam or Vtappet shaft S, which latter has a Ilongitudinal reciprocating movement imparted to it by suitable means, and is provided with a suitable cam surface la to operateat proper intervals the valve spindle to move the valve against the stress of'its opposed spring, as will be understood without further explanation. The divided bearing g at its exterior opposite ends extends laterally through guide slots g formed for their reception in the walls of the valve chest B as shown more particularly in Fig. 2.

The cam-bearing portions of the shaft S are preferably separate from one another.

there being one section s for each steam chest,

indicated in Fig. 3. This is the preferred Vis Vput into the steam chest.

construction, although the shaft may 'be' in one continuous piece if desired...` Y

Under this arrangement the machining of all parts of the cage which require it, can be effected readily, accurately, yin perfect alineinent, and atlittleexpeiisef The cage contains in a single castinglall the parts that are needed to support and hold and guide the valve-and all its operating appliances to and' including the valve operating cam shaft. And the valvetogether witli;its complete operating outfit canv be Vmounted pand" assembled iny that casting, before thek lattei` The steam inlet end of each cylindrical valve chest B is closed by ahead B removablysecured in place by bolts and nuts as customary. At thef'opposite `end the steam chest is closed by the cage which protrudes through and beyond it, their annular flanged ends being bolted, together as hereinbefore described'. The open end of thelcage is fitted y with a removable cap or shield c of sheet metal or other suitable material to exclude dust and dirt 'and'other extraneous matter from the interior of the cage.

f Iiithe drawings I have illustrated my iniprovernents in the .structural form in which I prefer to embody them and which is de-` signed more `particularlyfor usein connec- Y tion with a steam-engine of semi-uniflow v type with-a centralexhaust, as indicated in the drawings. My improvements'are however applicable to steam engines of other types whether ythe ordinary'reciprocating or the straight uniflow engine. The struci'sural fornjiin which they'are embodied can also be varied. Itis not indispensable, for examplein orderto ava-ilof the advantages deiivedffrom the, improved cage construction that the valve chest should occupy the particular positioiirelatively to the steam cylinder in which it is shown in the draw- In these and other respects the construction can vbefvaried to; some extent without departure from the spirit of the invention. I do not limit myself, therefore, strictly to the structural details hereinbefore shown and .described in illustration of my invention,VV but what I claim as new and desire' to secure by' Letters Patent is as follows:

l. The combination with a steam cylinder Y and a valve chest, of the following elements namely 'z a valve cage fitted and removably held in a'seat of corresponding 'shape in the valve chest and'v formed with a clearance chamber and valve seats therein and an axial tubular bearing or-guide for the valve spindle; a double seated spring-closed puppet valve in said 'clearance chamber pro-V vided with' a valve spindle extending out through the saidaxial tubular befring or guide; bearing for the operating camshaft extending diainetrically crosswise of the open end VAof, and carried by, the cage; anda central tubular bearing carried by the said cam shaft bearingj'for the support and guidance of the roller' end of the valve spindle which engages the cam operating shaft-all ofthe elements named being can ried by, and movable as an entirety with, the valvecage.

2. valve cage formedvwith a clearance chamber andvalve seats therein, an axial tubular valve spindle guide integral with the rear wall of the clearance chamber, a divided cam-shaft bearing integral with the cage composed of two tubular sections ex-V tending in'axial alinement with each other from diametrically opposite sides of the valve cagefpart way`v across the saine, kand a tubular bearing integral withl and at right angles tothe divided camV shaft bearing spanning the. *spaceV between the'inner adjoining ends of said divided cam shaft bear--V ing and in axial alinement with the main spindle guide, to receive and supportl the roller end of the valvespindle; in combination with a steam cylinder, a'valve chest in which thev valve cageV is removably housed,

a springc'losed valve and valve spindle, and

an operatingv cam shaft substantially as and for the purpose hereinbefore stated.

In testimony whereof I ,aliix my signature.

siEGrRinD nositnzwnie. l 

